$ pkill Xvnc
$ pkill Xrealvnc
$ sh -c "rm -f /tmp/.X*-lock /tmp/.X11-unix/X*"
[lla-addon-cybersecurity_master60] $ Xvnc -help
Starting xvnc
[lla-addon-cybersecurity_master60] $ Xvnc :12 -geometry 1024x768 -depth 24 -ac -SecurityTypes none -noreset
Xvnc TigerVNC 1.8.0 - built Nov 16 2020 16:47:50
Copyright (C) 1999-2017 TigerVNC Team and many others (see README.txt)
See http://www.tigervnc.org for information on TigerVNC.
Underlying X server release 12004000, The X.Org Foundation
Wed Jan 11 15:48:43 2023
vncext: VNC extension running!
vncext: Listening for VNC connections on all interface(s), port 5912
vncext: created VNC server for screen 0